FoxRex-144 Foxoring Receiver

FoxRex-144 FoxRex-144

Similar to the well know 80m receiver Foxrex-3500 (see below) the VHF foxoring receiver FoxRex-144 offer a great solutuon for VHF fox hunting. The receiver is built into a solid aluminium profile, which at the same time functions as the boom for three antenna elements. So the antenna is a three element Yagi antenna with good directionality, suitable for direction finding on 2m (144 MHz). The element construction follows an idea of WB2HOL and are made from flexbile steel tapes, in fact they are recycled tape measures. This makes the antenna nearly undestructible and extremely lightweight.

The central antenna boom houses the receiver, an LC display, the rechargeable battery and all controls. A coaxial DC connector is used for charging the battery with a 12 V supply. This is very useful, because you can recharge the battery while driving in your car to the foxoring competition. A 3.5mm headphone plug serves as an On/Off switch, i. e. operation is only possible with a headphone (32 Ω).

All operating controls of the FoxRex-144 are arranged in a well thought out layout: easy to reach and not to interfere with operation while on the chase to the transmitter site. An LC display with a size if 2x8 characters shows frequency, timer, the current transmitter and many other details. A slide switch selects the mode: normal operation, attenuator operation, menu programming. A rotary encoder with push button serves as main control for the menu settings. On the side a separate volume control is located. A small microprocessor controls the receiver functions, i. e. frequency, timer, alarms and so on. It supports various foxoring modes, as they are used in official international competions around the amateur radio world.

The receiver itself is a superhet design with 107 MHz IF and a quartz filter. A quartz controlled PLL is used for sufficiently precsie frequency control, the frequency range is from 143.9 to 148.1 MHz. The sensitivity is 0.1 µV, absolutely sufficient for the ranges used at regular foxoring events. An adjsutable attenuator helps in close range detection of the transmitter. The signal strength is show as a bar graph in the LC display and also presented as an acoustic signal in the headphone. The processor can be calibrated in respect to the transmitter output power, with this calibration a rough distance estimation is made. Depending on the selected competion mode (European style, chinese style etc.) up to 11 frequencies for different foxes can be stored. The built in battery supports the receiver for about 30 hours, an automatic power down mode prevents accidental deep discharge. The weight of the Foxrex-144 is only 530 g.

Articulo No.
FOXREX-144 FoxRex-144 Foxoring Receiver VHF 485.00 € Añadir al carro de la compra Nuevo Disponible, envio en 2 o 3 dis.
Gastos de envió
Download: User Manual Foxrex-144 (PDF, EN, 4.6MB)

Receptor FoxRex-3500

FoxRex-3500 FoxRex-3500 Receptor para el concurso ARDF

El FoxRex-3500 está inspirado en el famoso receptor 'FJRX85' diseñado por N. Roethe, DF1FO. Por ello, quien lo compre puede esperarse un receptor ligero y sólido, que es fácil de usar, incluso durante las competiciones.

El Foxrex-3500 trabaja en el margen de frecuencias de 3490 a 3660 kHz (Banda de 80m ). Puede almacenar hasta 4 frecuencias y soporta los modos tipicos de cazas del zorro como 'Classic', 'Sprint' etc . Un temporizador avisa al concursante de que se acerca el final de la transmisión del zorro. La frecuencia de recepción se puede ajustar fácilmente en pasos de 100 hz mientras se va corriendo.

El receptor va empaquetado en una sólida caja de aluminio y se envia con 2 antenas. Todo el equipo es muy robusto para que el cazador pueda estar tranquilo durante el concurso sin miedo a que rompa el receptor. El FoxRex-3500 es facil de manejar, solo tiene 2 botones con los cuales se controla la dirección de la señal recibida y se puede cambiar según la necesidad. Una pantalla digital LCD y un audio (via auriculares) te avisan de la intensidad de la señal y una alarma de proximidad te ayuda a ajustar sobre la marcha tu ruta para dar con el emisor.

Se alimenta con una bateria recargable con la cual el fabricante afirma que puede funcionar unas 40 horas. La bateria se puede cargar a 12V DC , lo cual es muy útil pues puedes cargarla también en el coche. El nivel de carga se muestra con una señal luminosa. El receptor lleva un atenuador de señal que puede ser ajustado en pasos de 5 dB ,atenuando hasta -110 dB. La selectividad del receptor es de unos -40 dB en 8 kHz, lo cual es totalmente suficiente para un receptor para ARDF.

Se necesitan auriculares. El fabricante recomienda auriculares estereo con impedancia de 32 Ω , el conector es de 3.5mm estereo. Un simple par de auriculares se incluye.

  • FoxRex-3500
  • Número de zorros ajustable de 1 a 10
  • 4 memorias para frecuencias
  • Función de bloqueo
  • Tiempo de duración de baliza del zorro ajustable
  • Varios estilos ARDF: Classic, Sprint, Foxoring, 'Czech' etc
  • Señal acústica de proximidad
  • Smeter acústico
  • Calculo de distancia
  • Menu en alemán e inglés
  • Sensor de voltaje de bateria se puede calibrar
  • Frecuencia se puede calibrar
  • Atenuador se puede calibrar
  • Temporizador de apagado automático
Articulo No.
FOXREX-3500 Receptor de 80m para caza del zorro/ARDF 329.00 € Añadir al carro de la compra Disponible, envio en 2 o 3 dis.
Gastos de envió
Descarga: Manual de usuario en inglés Foxrex-3500 (PDF, EN, 4.5MB)
Download: Bedienungsanleitung Foxrex-3500 (PDF, DE, 0.7MB)

RED-FOX-144, RED-FOX-3500 Foxoring Transmitter Nuevo

RED-FOX Sender

The RED-FOX Foxoring transmitters are very small and light transmitters for ARDF (Amateur Radio Direction Finding). They correspond partially to the official rules for ARDF competitions (Foxoring) and make it very easy to start practicing for a competition. The transmitters are equipped with two wires as a dipole antenna. This results in a range of approx. 100 to 300m for the 80m transmitter and up to 500m for the 2m transmitter, depending on the terrain. The transmitting power is less than 0.1 mW. The power supply is provided by a CR2032 button cell included in the scope of delivery, such a cell is sufficient for 30-40 hours of operation. An on/off switch is installed, a red LED flashes when the transmitter is switched on. The transmitters are only offered as open circuit boards as displayed, without housing. They are not weatherproof.

The RED-FOX ARDF transmitters are available in different versions. Currently the 80m transmitter is delivered as Rev. 1. In this version a continuous keying in CW with dots is sent as soon as the device is switched on. It is planned to offer a Rev. 2 later, which then continuously transmits the competition-compliant signals MOE, MOI, MOS, MOH and MO5. The Rev. 2 transmitters are factory programmed to one of these five transmission codes. If you are able to program an AVR controller, you can change it, the firmware is freely available. The transmission frequency is uniformly 3579 kHz.

The ARDF transmitters for 144 MHz are available in five variants, programmed with the signals MOE, MOI, MOS, MOH and MO5. If you are able to program an AVR controller, you can change it, the firmware is freely available. The signals are transmitted continuously, without pause. The transmission frequency is 144.002 MHz. Please indicate variant 1-5 when ordering.

A RED-FOX DF transmitter is included with each of the FoxRex receivers offered above. So you can start practicing right away, or demonstrate the direction finder on a fieldday or during a public event.

Articulo No.
ARDF-TX--144 ARDF Transmitter RedFox 2m Band Rev. 2 (144.002 MHz) Plazo de entrega desconocido. No tenemos datos.
ARDF-TX-3500 ARDF Transmitter RedFox 80m Band Rev. 1 (3579 kHz) 20.00 € Añadir al carro de la compra Disponible, envio en 2 o 3 dis.
Gastos de envió